java.lang.NoSuchMethodError: com.opensymphony.xwork.ObjectFactory.buildBean(Ljava/lang/String;Ljava/util/Map;)Ljava/lang/Object;
com.opensymphony.webwork.dispatcher.mapper.ActionMapperFactory.getMapper(ActionMapperFactory.java:37)
com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:101)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.

i saw xwork.jar files with two versions, so removed one of it so to avoid collision(as seen on google-help)

then i got error as:

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.